Respiratory Volumes - Tidal Volume and Lung Capacity
30 Questions
1 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to Lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What is the average volume of the tidal volume (TV)?

  • 1500 ml
  • 2500 ml
  • 1000 ml
  • 500 ml (correct)

Which respiratory volume represents the amount of air that can be forcibly expelled from the lungs?

  • Inspiratory reserve volume (IRV)
  • Expiratory reserve volume (ERV) (correct)
  • Residual volume (RV)
  • Tidal volume (TV)

What is the function of the residual volume (RV) in the lungs?

  • To facilitate gas exchange
  • To increase lung capacity
  • To aid in breathing efficiency
  • To keep the alveoli open (correct)

Which respiratory capacity includes the inspiratory reserve volume (IRV) and the tidal volume (TV)?

<p>Inspiratory capacity (IC) (D)</p> Signup and view all the answers

What does the total lung capacity (TLC) represent?

<p>Sum of all lung volumes (A)</p> Signup and view all the answers

Which respiratory volume combines with the expiratory reserve volume (ERV) to form the functional residual capacity (FRC)?

<p>Residual volume (RV) (B)</p> Signup and view all the answers

What is the main function of the nose in the respiratory system?

<p>Filtering and cleaning inspired air (B)</p> Signup and view all the answers

Which organ is responsible for the exchange of oxygen and carbon dioxide between the blood vessels and tissues?

<p>Alveoli (B)</p> Signup and view all the answers

What is the function of the paranasal sinuses in the respiratory system?

<p>Producing mucus (B)</p> Signup and view all the answers

Which part of the respiratory system serves as a resonating chamber for speech?

<p>Larynx (D)</p> Signup and view all the answers

What is the main function of the trachea?

<p>Conduction of air to and from lungs (C)</p> Signup and view all the answers

Which part of the respiratory system is responsible for the movement of air into and out of the lungs?

<p>Nasal cavity (B)</p> Signup and view all the answers

What forms the external nose?

<p>Nasal and frontal bones superiorly, maxillary bones laterally (D)</p> Signup and view all the answers

Which bones contribute to the formation of the nasal septum?

<p>Cartilage, vomer bone, and ethmoid bone (D)</p> Signup and view all the answers

What is the function of the nasal vestibule?

<p>Lined with hairs that filter coarse particles from inspired air (A)</p> Signup and view all the answers

What are the functions of the nasal conchae and nasal mucosa during inhalation?

<p>Filter, heat, and moisten air (B)</p> Signup and view all the answers

Which type of mucosa is responsible for containing smell receptors?

<p>Olfactory mucosa (D)</p> Signup and view all the answers

How does the structure of the external nose differ from the nasal conchae?

<p>External nose is formed by bones, while nasal conchae are scroll-like projections covered with mucosa (B)</p> Signup and view all the answers

What does Dalton's Law of Partial Pressures state?

<p>The total pressure of a mixture of gases is the sum of the partial pressures of the individual components. (B)</p> Signup and view all the answers

What is true about alveoli in the lungs based on the text?

<p>PO2 is low and PCO2 is high. (C)</p> Signup and view all the answers

What occurs in pulmonary capillaries according to Dalton's Law?

<p>PO2 is low and PCO2 is high. (B)</p> Signup and view all the answers

According to Dalton's Law, what happens in systemic tissues?

<p>PO2 is low and PCO2 is high. (B)</p> Signup and view all the answers

What does Henry's Law predict about gas exchange in the alveoli and bloodstream?

<p>The amount of oxygen that dissolves into the bloodstream depends on the partial pressure of oxygen in alveolar air. (C)</p> Signup and view all the answers

How does the relative concentration of gases change as the pressure and volume of a gas mixture changes?

<p>The relative concentration of gases remains constant. (B)</p> Signup and view all the answers

Why does CO2 diffuse in equal amounts with oxygen during external respiration?

<p>CO2 is more soluble in plasma and alveolar fluid than oxygen. (A)</p> Signup and view all the answers

What determines the rate of gas movement through the respiratory membrane?

<p>Thickness of the respiratory membranes and the concentration of the gas. (B)</p> Signup and view all the answers

Why does oxygen move from blood to tissues during internal respiration?

<p>Tissue PO2 is lower than arterial blood PO2. (B)</p> Signup and view all the answers

How is molecular oxygen primarily transported in the blood?

<p>Dissolved in plasma and bound to hemoglobin in red blood cells. (D)</p> Signup and view all the answers

What makes CO2 diffusion efficient during external respiration despite a less steep partial pressure gradient?

<p>Higher solubility of CO2 in plasma and alveolar fluid. (A)</p> Signup and view all the answers

What role does the thickness of the respiratory membranes play in gas exchange?

<p>It affects the rate of diffusion through the respiratory membrane. (D)</p> Signup and view all the answers

More Like This

Use Quizgecko on...
Browser
Browser